Since the launch of the Radeon RX 7900 series graphics cards, AMD has been quiet about the remainder of the RDNA 3 lineup. The Radeon RX 7800 XT is said to leverage the Navi 32 chip which is likely another chiplet design. According to RedGamingTech, the Radeon RX 7800 XT will feature 60 Compute Units (CU) or 30 Workgroup Processors (WGP) for a total of 3,840 stream processors.
The Graphics Compute Die (GCD) will be a TSMC 5nm die while the Memory Complex Dies (MCDs) will leverage a more mature node with four disaggregated dies. Each MCD will come with a 64-bit memory controller and 16MB of L3 “Infinity” Cache. Overall, we get a 256-bit memory bus and 64MB of L3 cache paired with 16GB of GDDR6 memory. The RX 7800 XT is expected to have a TBP of 285W.
Moving onto the Radeon RX 7700 XT, we’re looking at the same Navi 32 die but with a cut-down MCD and three instead of four MCDs. It will allegedly feature 54CUs or 27WGPs which translates to 3,456 shaders. It will be paired with 12GB of GDDR6 memory via a 192-bit bus and 48MB of L3 cache. The RX 7700 XT is said to have a TBP of 225W.
It’s worth noting that the RTX 4070 which is almost certainly faster than the RX 7700 XT has a TBP of 200W while the RTX 4070 Ti tops out at 285W. Furthermore, both GPU architectures leverage the same process node (TSMC N5) with RDNA 3 being a chiplet design.